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Gaia DR3 2893941099963718528

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Gaia DR3 289341099963718528
NGC 2243 DSS.jpg
Red circle.svg
DSS image of NGC 2243, the open cluster where Gaia DR3 289341099963718528 (circled) is located in.
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Canis Major
Right ascension 06h 29m 31.108s [1]
Declination −31° 20′ 59.54″ [1]
Apparent magnitude  (V)15.6 [2]
Characteristics
Evolutionary stage Blue straggler [3]
Spectral type A3V [4]
Apparent magnitude  (G)15.09 [5]
Astrometry
Proper motion (μ)RA: −1.243 [1] mas/yr
Dec.: +5.480 [1] mas/yr
Parallax (π)0.2365±0.0207  mas [1]
Distance 14,000 ± 1,000  ly
(4,200 ± 400  pc)
Details
Mass 1.72±0.12 [3]   M☉
Radius 1.23±0.22 [3]   R☉
Luminosity 10.59±0.03 [3]   L☉
Surface gravity (log g)4.49±0.58 [3]   cgs
Temperature 8,800±700 [3]   K
Metallicity [Fe/H]−0.31±0.15 [3]   dex
Rotational velocity (v sin i)95.63±9.78 [3]  km/s
Age 510±70 [3]   Myr
Other designations
Gaia DR3 2893941099963718528, Gaia DR2 2893941099963718528
Database references
SIMBAD data

Gaia DR3 2893941099963718528 is a blue straggler star in the constellation of Canis Major. [5] [3] The star is located in the open cluster designated NGC 2243, and it is approximately 11,900 light years (or 3,650 parsecs) away. [3] [4] It has an apparent G-band magnitude of 15.09. [5] It was first discovered in August 2018 in the second data release of the Gaia Telescope. [6] [7] [8]

Contents

Stellar Characteristics

Gaia DR3 2893941099963718528 is a luminous, massive blue straggler star in the open cluster NGC 2243. [5] [3] The star has an estimated radius of 1.23±0.22 R☉, and a predicted mass of 1.72±0.12 M☉. [3] [4] The radius was found using a bolometric luminosity of 10.59±0.03L☉, and an effective temperature of 8,800±700 K. [3] [4] It is believed to be extremely metal-poor with a metallicity of −0.31±0.15 dex. [3] [4] It is proposed to be 510±70 million years old. [3] [4] The star has a spectral type of A3V. [4] It is a fast rotating star with a rotational velocity of 95.63±9.78 km/s. [3]

Substellar System

In 2026, a substellar object was discovered orbiting around Gaia DR3 2893941099963718528. [3] It is designated Gaia DR3 2893941099963718528 b and is either a planet or brown dwarf. [3] The substellar object is in a tight, low eccentricity compact orbit around its host star in roughly 5.6 hours. [3] [4] The substellar object has a mass between 20 and 70 MJ, implying that it is likely a brown dwarf. [3] [4] The substellar object has a radius of 0.8 RJ, and calculated temperature between 1,100 and 2,500 K. [3] [4]

The Gaia DR3 2893941099963718528 planetary system [3] [4]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(hours)		 Eccentricity Inclination Radius
b20-70  MJ 0.0095.620.03±0.0121.08±4.49 ° 0.8  RJ

References

  1. 1 2 3 4 5 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  2. ↑ Lasker, Barry M.; Lattanzi, Mario G.; McLean, Brian J.; Bucciarelli, Beatrice; Drimmel, Ronald; Garcia, Jorge; Greene, Gretchen; Guglielmetti, Fabrizia; Hanley, Christopher; Hawkins, George; Laidler, Victoria G.; Loomis, Charles; Meakes, Michael; Mignani, Roberto; Morbidelli, Roberto; Morrison, Jane; Pannunzio, Renato; Rosenberg, Amy; Sarasso, Maria; Smart, Richard L.; Spagna, Alessandro; Sturch, Conrad R.; Volpicelli, Antonio; White, Richard L.; Wolfe, David; Zacchei, Andrea (2008). "The Second-Generation Guide Star Catalog: Description and Properties". The Astronomical Journal. 136 (2): 735. arXiv: 0807.2522 . Bibcode:2008AJ....136..735L. doi:10.1088/0004-6256/136/2/735.
  3. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Sheikh, A. H. (2026). "First discovery of a fast-rotating blue straggler in a compact binary with a sub-stellar companion". NASA Ads. 545 (4) staf2130. Bibcode:2026MNRAS.545f2130S. doi: 10.1093/mnras/staf2130 .
  4. 1 2 3 4 5 6 7 8 9 10 11 "EPE Results for Gaia DR3 2893941099963718528". Extrasolar Planets Encyclopaedia. Retrieved 2026-01-20.
  5. 1 2 3 4 "SIMBAD Results for Gaia DR3 2893941099963718528". SIMBAD. Retrieved 2026-01-20.
  6. ↑ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 .
  7. ↑ Sheikh, A. H.; Medhi, Biman J. (2024-12-01). "Characterization of the Blue Straggler Star Populations, through Statistical, Photometric, and Spectral Energy Distribution Analysis, in the Old Open Cluster: NGC 2243". The Astronomical Journal. 168 (6): 274. Bibcode:2024AJ....168..274S. doi: 10.3847/1538-3881/ad84eb . ISSN   0004-6256.
  8. ↑ Zeng, Dexin; Mei, Ying; Chi, Huanbin; Deng, Hui; Wang, Feng (2025-10-01). "Comprehensive Analysis of NGC 6134: Structure, Dynamics, and Blue Straggler Star Candidates". The Astrophysical Journal Supplement Series. 280 (2): 74. Bibcode:2025ApJS..280...74Z. doi: 10.3847/1538-4365/ae0643 . ISSN   0067-0049.
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